I have a B8 Pro China in the basement somewhere that I haven't touched in 25 years. I should dust it off and see how it sounds.I have several Pro and B8 Pro cymbals, and I love them! They're a cut-above the B8 line. I suspect they're all made the same, but some are better than others and get the Pro designation. Cymbal companies often make cymbals, and then decide exactly where they fit (there are some obvious exceptions of course.)
Sound-wise it doesn't seem unusual for a Pro could sound like an A-Custom. However, I wouldn't rely on the Pro to take a beating.